Indoor Unit Fan Motor 2 Rotation Speed Error - Fujitsu Airstage VR-II Series Service Manual

Trouble shooting 84
INDOOR UNIT Error Method:
Indoor Unit Fan Motor 2 rotation
speed Error
Detective Actuators:
Indoor Unit Controller PCB Circuit
Indoor Fan Motor 2
Forecast of Cause : 1. Fan rotation failure 2. Fan motor winding open 3. Motor protection by ambient temp. increase
4. Capacitor failure 5. Controller PCB failure
Check Point 1 : Check rotation of Fan
Rotate the fan by hand when operation is off.
(Check if fan is caught, dropped off or locked motor)
>>If Fan or Bearing is abnormal, replace it.
OK
Check Point 2 : Check Motor winding / Internal PCB circuit
Check Indoor Fan motor ( Refer to the PARTS INFORMATION 21)
>>If Fan motor is abnormal, replace it.
OK
Check Point 3 : Check ambient temp. around motor
Check excessively high temperature around the motor.
(If there is any surrounding equipment that causes heat)
>>Upon the temperature coming down, restart operation..
OK
Check Point 4 : Check Motor Capacitor
Check continuity of motor capacitor
>>If it is shorted, replace the capacitor.
OK
Check Point 5 : Replace Controller PCB
Change Controller PCB and set up the original address.
Indicate or Display:
E59. 2
Outdoor Unit : E.5 U.1
Error Code : 5 9, 5 9. 2
Detective details:
When the FAN motor feed back rotation value which is detecting on the
controller PCB becomes 0 and lasts for more than 1 minute at motor opera
tion condition.
Or, when the feed back rotation value contimues at 1/ 3 of target value for more
than 1 minute.
04-88 +5